A320041 Primes that are values of A215240.
3, 13, 6163, 8311, 12097, 13159, 14957, 18433, 21061, 23627, 24571, 27061, 29863, 35617, 40897, 44221, 45307, 45737, 45821, 67421, 68113, 69313, 71237, 75377, 82903, 89227, 89269, 89671, 94543, 100483, 101533, 101833, 113683, 114827, 118903, 121763, 122167, 125933, 131581, 131617, 143461, 144061
Offset: 1
Keywords
Examples
a(3) = 6163 is in the sequence because it is prime and A215240(264) = 6163.
Links
- Robert Israel, Table of n, a(n) for n = 1..594
Programs
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Maple
N:= 10^5: # to get all terms <= N f:= n -> convert(numtheory:-invphi(n),`+`): Res:= {}: for n from 1 to N do v:= f(n); if isprime(v) and v <= N then Res:= Res union {v} fi od: Res;
Comments